Uncovering non-Fermi-liquid behavior in Hund metals: critical behavior of a three-orbital Kondo model

ORAL

Abstract

When using dynamical mean field theory (DMFT) to study Hund metals, one arrives at self-consistent impurity models in which bath and impurity both have spin and orbital degrees of freedom. If these are screened at different energy scales, TKsp < TKorb, the intermediate energy window is governed by a novel non-Fermi-liquid (NFL) fixed point, involving screened orbital degrees of freedom weakly coupled to an unscreened local spin. Here we characterize the corresponding NFL behavior in detail for a 3-orbital Kondo model, tuned such that the NFL energy window is very wide. We find excellent agreement between conformal field theory (CFT) predictions and numerical renormalization group (NRG) results.

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Presenters

  • Elias Walter

    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

Authors

  • Elias Walter

    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

  • Katharina M Stadler

    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

  • Seung-Sup B. Lee

    • Ludwig-Maximilians-Universität München, Munich, Germany
    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

  • Yilin Wang

    • Department of Condensed Matter Physics and Materials Science, Upton, New York 11973, USA, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, NY

  • Gabriel Kotliar

    • Rutgers University and Brookhaven National Laboratories
    • Department of Condensed Matter Physics and Materials Science, Upton, New York 11973, USA, Brookhaven National Laboratory
    • Rutgers University, New Brunswick
    • Brookhaven National Laboratory
    • Department of Physics, Rutgers University
    • Physics, Rutgers University
    • Rutgers University, New Jersey, USA
    • Physics and Astronomy Department, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, NJ

  • Andreas Weichselbaum

    • Brookhaven National Laboratory
    • Brookhaven National Laboratory, New York, USA
    • Brookhaven National Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, NY

  • Jan Von Delft

    • Arnold Sommerfeld Centre for Theoretical Physics, Ludwig-Maximilians University
    • Ludwig-Maximilians-Universität München, Munich, Germany
    • University of Munich
    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany